Scot, Many old timers will tell you that they were taught to get as much accomplished with each outlet, welded or mechanical tee, as possible because it was cheaper. This may have changed with the advent of automated welding and hole cutting machines. I haven't checked the numbers in the last decade... or so.
Regarding the steel to plastic transition, of course you can make the transition as often as you feel advisable but there are several things you may not be considering. 1- The transition pieces themselves are comparatively expensive. 2- I believe that there were some problems with the bonding of the brass inserts to the CPVC. This I believe has been resolved but it may not seem worth the risk to your boss anymore. 3- Last but not least important, whenever you put CPVC next to steel you run the risk of getting cutting oil on the plastic. If this happens the plastic will eventually fail. Minimizing this reduces long term risk. It sounds to me like your boss has a pretty good idea of where he wants to spend his money and what his tolerance for risk is. F. William Koebrich III, SET SimplexGrinnell LP Sales Representative Direct: 954-862-5229 Cell: 954-931-0495 Fax: 305-825-8880 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of å... .... Sent: Tuesday, July 31, 2007 5:56 PM To: [email protected] Subject: NFPA 13 residential: weld-o-lets off a main,and plastic-steel interfacing I am not a fitter. That qualifies some of the ignorance with the first question. The second question I think I know, but I hope to get some ammo to go to take to the boss, you know. My boss is telling me not to put any weld-o-lets on a main line. Instead he wants them all on the branch lines. I have a 2-1/2 inch "main" running down a corridor. He wants the main offset and all sprinklers for the corridor to come off of the branchlines into the rooms. Not all of the corridor sprinklers line up with the branch lines, so it is a bit more piping; however it is not excessive. Just curious as to what anyone might use for the logic in this. If there is logic with not putting sprinklers off of the main, it will educate me to know it. Second question... My boss says if a job has plastic pipe, then the entire job should use plastic pipe. I think that is ridiculous for the relatively more-expensive sizes over 3 inches where i hear steel comes in under the plastic costs. Anyone have opinions and facts regarding transitioning from plastic to steel as a valid way to go, when pipe diameters exceed 3 inches? scot deal excelsior fire _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
